Recently, the Ministry of Railways tweeted an explanation of the symbol's importance and why it appears on every train. According to the Ministry's tweet, "Did you know? The letter 'X' on the last ...

And the letter, as signified by the skull and crossbones ... The X2000, Sweden’s high-speed train. The X-Acto knife. Mac OS X. The X game for Nintendo’s Game Boy. Microsoft’s Xbox console.

New Delhi: Ever wondered what does the letter ‘X’ on the back of the last Kalaburagi district of the statecoach of an Indian Railways’ train means? If this question has crossed your mind ...